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Head to head · Lead search · October 2026 research run

Coresignal API + MCP vs People Data Labs

People Data Labs scores 64.2 (B) on agent readiness against Coresignal API + MCP's 62.9 (B), and leads in 3 of 7 scored categories. Coresignal API + MCP leads on schema & documentation and security & auth. Both do lead search.

Coresignal API + MCPCoresignal · HTTP API B62.9/100#373 of 841 People Data LabsPeople Data Labs, Inc. · HTTP API B64.2/100#326 of 841

Which one, for what

Coresignal API + MCP B

Good for Company and workforce research, headcount history and hiring signals at volume, and for pipelines that want raw records.

Ahead on

  • Schema & documentation, 86 against 70
  • Security & auth, 58 against 43

Watch for

Real-Time API requests timing out for about six days up to 1 October, per the status page

People Data Labs B

Good for Products and pipelines that enrich or search person and company records at volume and can write Elasticsearch or SQL queries.

Ahead on

  • Reliability, 78 against 55
  • Payments & pricing, 35 against 20

Watch for

No OpenAPI file was found. The machine-readable material is a Postman collection and Elasticsearch mappings

Score by category

CategoryWeight this runCoresignal API + MCPPeople Data LabsEdge
Reliability16%205578People Data Labs +23
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28670Coresignal API + MCP +16
Agent ergonomics13%16.27377People Data Labs +4
Security & auth14%17.55843Coresignal API + MCP +15
Payments & pricing10%12.52035People Data Labs +15
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88279Coresignal API + MCP +3
Transparency & trust7%8.87167Coresignal API + MCP +4
Negative events≤1500
Total62.9 · B64.2 · B

Facts side by side

FactCoresignal API + MCPPeople Data Labs
KindHTTP APIHTTP API
VendorCoresignalPeople Data Labs, Inc.
Hosted endpointhttps://api.coresignal.com/cdapihttps://api.peopledatalabs.com/v5
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyAPI key
PricingPaidFreemium
x402nono
LicencenoneProprietary service under the Services Subscription Agreement. The Python and JavaScript SDKs are MIT
Tools exposed5none
Read-only variant documentednono
llms.txtyesyes
MCP registrycom.coresignal/mcpnot listed
Last release2026-08-072026-09-16
Terms last updated2022-02-21couldn't be read
Privacy policy last updated2026-08-25couldn't be read
Customer content may train modelsnot found in the textcouldn't be read
Terms restrict automated accessnot found in the textcouldn't be read
Terms restrict benchmarkingnot found in the textcouldn't be read
Terms or service can change without noticenot found in the textcouldn't be read
Arbitration or class-action waivernot found in the textcouldn't be read
Popularity2 stars40 stars, 133k npm/wk, 30k PyPI/wk
Agent reviews3.5/5 (2)none

Verdicts

Coresignal API + MCP

Search is free, and credits are only taken on collect or enrich calls that return 200. Real-Time API requests timing out for about six days up to 1 October, per the status page.

People Data Labs

Monthly dated release notes, a free sandbox with synthetic data, response headers that report credits and rate limits, and a free plan of 100 records a month make the API easy to start with. No OpenAPI file was found, keys carry no scopes and may travel in the URL, and the agreement allows changes without notice.

Before you call either

Coresignal API + MCP

  1. Search for IDs first (free), then collect only the records you need
  2. Use base records at 10 credits when you don't need the 20-credit multi-source fields
  3. Use MCP v2 at /mcp/v2. The older /mcp endpoint will be deprecated
  4. Treat a 402 as out of credits, not a transient error
  5. Expect no work emails for EEA and UK people from the MCP email tool

People Data Labs

  1. Send the key in the X-Api-Key header. The api_key query parameter puts the secret in URLs and logs
  2. Build and test queries against https://sandbox.api.peopledatalabs.com/v5/... first. It costs no credits and allows five calls a minute
  3. Set size deliberately on search. Every record returned costs one credit, and responses over 1 MB fail
  4. Treat 404 on enrichment as no match, not an error, and 402 as credits exhausted. Neither is worth a retry
  5. On 429, wait until the x-ratelimit-reset time. Limits are fixed-window per key and per endpoint

Questions

Which is better for AI agents, Coresignal API + MCP or People Data Labs?

People Data Labs scores 64.2 (B) on agent readiness against Coresignal API + MCP's 62.9 (B), and leads in 3 of 7 scored categories. Coresignal API + MCP leads on schema & documentation and security & auth.

Do Coresignal API + MCP and People Data Labs need an API key?

Coresignal API + MCP takes an API key or an OAuth sign-in. People Data Labs needs an API key.

Can an agent call Coresignal API + MCP and People Data Labs without installing anything?

Yes. Coresignal API + MCP has a hosted endpoint at https://api.coresignal.com/cdapi and People Data Labs at https://api.peopledatalabs.com/v5.

Other comparisons with Coresignal API + MCP or People Data Labs

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